Caterpillar Inc.

Exxonmobil Research and Engineering Company

Christie Susan Ragle

Ronald Graham Silver

Paul Park

Svetlana Mikhailovna Zemskova

Julie Marie Faas

Colleen J Eckstein

Mohan Kalyanaraman

Richard A Crandell

Dong Fei

Cheryl Lynn Sellers

Virgil R Hester

Mark Alan Gasper

Jeremy Trethewey

Orlando Sellers, Ii

Matthew Owen Stefanick

Carrie L Boyer

Daniel S Nordyke

Bappaditya Banerjee

Jill R Akers

A method of providing an exhaust treatment device is disclosed. The method includes applying a catalyst including gold and a platinum group metal to a particulate filter. The concentration of the gold and the platinum group metal is sufficient to enable oxidation of carbon monoxide and nitric oxide.

Exhaust system having a gold-platinum group metal catalyst

A method of ammonia production for a selective catalytic reduction system includes producing a first exhaust flow and a second exhaust flow. The first exhaust flow has a higher NOx concentration than the second exhaust flow. The method also includes directing a portion of the second exhaust flow to a reformer. The method further includes combining the portion of the second exhaust flow directed to the reformer with the first exhaust flow upstream of an ammonia-producing catalyst.

System and method for ammonia production

A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NOtherein, wherein the apparatus includes a first catalyst composed of a silver-containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, a second catalyst composed of a copper-containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range, a hydrocarbon compound for injection into the gas stream upstream of the first catalyst to provide a reductant, and a reformer for reforming a portion of the hydrocarbon compound into Hand/or oxygenated hydrocarbon for injection into the gas stream upstream of the first catalyst. The second catalyst is adapted to facilitate the reaction of reducing NOx into N, whereby the intermediates are produced via the first catalyst reacting with NOx and hydrocarbons.

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An exhaust emission control system for an internal combustion engine is disclosed. The exhaust emission control system has a first passageway and a second passageway disposed to receive exhaust in parallel. The exhaust emission control system also has a valve arrangement configured to regulate the flow of exhaust to the first and second passageways, and at least one sensor configured to sense a parameter indicative of a constituent of the exhaust. The at least one sensor generates a signal corresponding to the sensed parameter. The exhaust emission control system also has a controller in communication with the valve and the at least one sensor. The controller is configured to affect operation of the valve in response to the signal.

Dual path exhaust emission control system

A method of making an exhaust treatment element includes washcoating a substrate with a slurry that includes a catalyst support material. At least some of the catalyst support material from the slurry may be transferred to the substrate, and silver metal (Ag) is dispersed within the catalyst support material.

Silver doped catalysts for treatment of exhaust

According to an exemplary embodiment of the present disclosure, a method of detecting matter within a filtering device includes measuring a metric indicative of a first quantity of matter within the filtering device and removing a portion of the matter from the filtering device. The method also includes measuring a metric indicative of a second quantity of matter remaining within the filtering device.

Filter service system and method

Growing community of inventors

Havana, IL, United States of America

Christie Susan Ragle